Subject Line Length: An analysis of 9,313,885 emails to discover most effective email length


Subject Line Length- An analysis of 9 313 885 emails to discover most effective length

“The Idea Email,” and is made up of one landscaped image, a headline and the 350 words of copy.

With mobile overtaking the desktop for email open rates, I was doing some research this afternoon on the viewable length of subject lines on a mobile device. Subject lines are typically more important than the email content itself when it comes to the behavior of the reader and whether or not they’re going to open the email.

Now that most email is open on a mobile device, the number of characters you have on an iPhone, Android, Windows or Blackberry device is incredibly short… ranging between just 33 and 44 characters. Our subject here… Mobile Email Subject Line Displays comes in at just 34 characters. That’s not a lot of room to raise the curiosity of our reader and get them to open – quite a challenge for email marketers.

Google 2015 version of ranking up and down indicators

The factors Google put on the list as being more important in 2015 are:

  • User experience metrics (all of them)
  • Shorter title tags
  • Original content
  • Engaging content that provides an answer, teaches, informs, is useful, delights
  • Original images
  • Quality site design
  • Descriptive meta description

The factors that he would go as far as to call deprecated, as in, no longer used by Google are:

  • Keywords
  • Focus on longtail phrases
  • Focus on ranking for specific keyword phrases
  • Lean code

The long tail does seem to be dead, it is more about the whole site experience and broader keywords than going after the big blue pineapple chair anymore.

Others added that responsive (mobile) friendly design and schema should be added to the list. I’d agree with that. But there is a lot more discussion around what should and should not be on these lists.